Derrick.



'PATENTED JAN. 28, 1908.

P. YORKE. DERRICK.

APPLICATION FILED SEPT.16, 1901,

' tho by?!" FATE CK YORKE, OF WASHINGTON, PENNSYLVANIA.

BEE-REQK.

No. E'ZZfiQ. ijg soifieation of fattest. Patented, I? 2%]303.

. ippliuatim d fieptember 16. 1997 Serial 1%. 392.957

certain nowfand 'useiful l v v r. .Derriclrs; mm .5. do hereby declare the foldescrr lowing to be full, clear, and exact tion of my inventiomsuch as will enab 6 others skilled in the to whisk it appertains to marks and use the me.

improve- Ma 5 lasing in minor of talent i v V The motor adjusting tho-girtlis amtcos.

i will. now describe rnyinvention, referen'oe being had to the accompanying draw-- ingst in which, Y

t 1gure 1, 18 a sidetlervstion of my improved srrioli. Fig. 2-, st raisin. view'of one of the outside section pl mar ates-arms I ules the sst; I or mm, D, the girtns arm. F,

comers or tits (let the braces I As will no seen the setters! ssstions of the. derrick are clamped together by means of t shove referred rote plates for v mterrt. Instead. I drill a series of holes zri'tlia barof the iron, imlit'ztted by tits reference a,

plates ss'in my im'meripaton to, but (to not K and 2 hole in the ends of tho bra-Be whic 1% adapted to rs; with the holes :11 tho T-in W in by pm bolt through thoso I'm rigfi r cla in posi Lion. The two ends t a 33-521 oi the i' iron are rovicled wi th slo 32 of holes and smi llig. 3, is a sim lar View of one or 2.19 ins de sect-ion a 13'! this plate for the pun 5; the bar o the plate D.

This is 1 ssszty the plates engage all four sililss o; the corner or upright of the derrick. The angle-irons at the base and crown of the derrick are made in about the some manner as the T-irons, losing formed with a, slot in ono end. and the. series of holes in the opposite and. l

From actual experience with this derrick it has provan to be a much better, simpler derrick known to our business.

Having desor' ,orl my invention, min; is: l

The combinzttion with. the sorner uprights,

Wl'ist .1

PfifllUC-K YORKE.

as G. :HUGE-XES,

will soon by reference to Big. 3,

girtlls and braces, or" male and femal and chest-per alsrriok thim any other form of 

